I am trying for the first time doing the site myself so as you pros will see I have probably got a lot to do but feedback and guidance welcome!
www.makeupdelights.co.uk
You did a great job. I know what you do. The theme is laid out well but the colors are too bright. It would look more professional if that part of your site was not so bright.
I like the way you have very uniform circle thumbnails, its different but it looks nice. Your details pages and browse pages look fine too, professional. I guess the only thing I don't like is the color as well. I have to agree with kane357. I couldn't shop for a very long time at a site with fuschia as their main color because it starts to hurt my eyes. Maybe you can use it as a secondary color and use another color as primary?
I think overall you did a good job but I think the shopper experience would be enhanced if you had a primary color that was softer. If you want to go in the pink family, try bringing down the saturation.